Galatians 4:9-10 is a favorite target of those who claim Christians no longer need to observe God's holy days. Is that really what Paul said? Earl Henn shows that he meant something entirely different!
John Ritenbaugh affirms that the way to be undefiled (to become sanctified, developing character) is to walk in the Law of the Lord (Psalm 119:1). We must do God's Word or it will never be a part of us. The Colossian Christians (Colossians 2:16-17) were criticized by Gnostic infiltrators for the way they were keeping the holy days. Paul admonishes the embattled Colossians not to let any man judge them for the way they were keeping the holy days. Contrary to some misguided Bible scholars, (1) keeping the Sabbath is not a doctrine of men; (2) what Paul condemns is a philosophy; God's word is not a philosophy. (Paul is concerned about the context in the way this philosophy was impacting on those keeping God's Word.) (3) Paul calls this Gnostic system (not God's holy days) empty, vain deceit, and (4) he names the authors of this Gnostic system and its recipients demons.
John Ritenbaugh asserts that nothing is more important than the truth or the seeking after the truth. If we are going to be searching for truth, we should not be seeking it in the philosophies of men (a syncretic system of beliefs having its source in Babylon, a combination of human reason aided by demonic spirits and astrological prognostication - the weak and beggarly elements referred to by the apostle Paul in Galatians 4:9) but rather in the fullness of truth found in Christ with God's revelation as the final arbiter. There must be a continuous searching for more truth with the seeking of the kingdom of God as the highest priority to the end that we grow to full spiritual maturity.
John Ritenbaugh affirms that Jesus Christ's sinlessness was not the result of being a programmed automaton, but instead as a result of volition or choice—actively struggling against carnal pulls and temptations, enabling Him to fully empathize and have compassion on those tempted in like manner. He experienced exactly the same kind of temptations and suffering we experience, qualifying Him for the role of High Priest, bridge-builder between man and God, the same role for which members of God's called-out Family are also qualifying. Like our Elder Brother, we must learn righteous judgment by continually exercising our spiritual muscle, practicing making choices, distinguishing right from wrong, but building godly character and spiritual maturity through the enabling power of God's Holy Spirit.